Amphibious is based upon Greek words that mean living a double life and amphibians live in both land and water.
Trip the light fantastic piece of good fortune, usually unexpected the books are those in which bookmakers keep a record of bets. Something that happens (turns up) unexpectedly is welcome to bookmakers because few people will have bet on it and not many winnings will have to be paid out.
February 1865 is the only month in recorded history not have a full moon.
A rhinoceros horn is made of compacted hair.
Ham radio operators got the term ham coined from the expression ham-fisted operators a term used to describe early radio users who sent Morse code (i.e pounded their fists).